my index does not show the slider in start

Your image URLs are wrong: they link to a directory above the root directory. This cannot work. Place the images in the theme instead and use get_template_directory_uri():

src="https://wordpress.stackexchange.com/questions/101801/<?php 
    echo get_template_directory_uri() ."/images/slider/xfs_968x350_s80_mainTop2.jpg'; 
?>"